Lebanese Movement in Support of Fatah

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{{Short description|Lebanese militia active during the Lebanese Civil War}}

{{Infobox War Faction

| name = Lebanese Movement in Support of Fatah
الحركة اللبنانية لدعم فتح

| war = Lebanese Civil War

| image =

| caption =

| active = 1968 - ?

| leaders = Usama Fakhuri

| headquarters = West Beirut

| area = West Beirut

| size =

| predecessor =

| partof = Lebanese National Movement

| allies = {{flagicon|Palestine}} Palestine Liberation Organization (PLO)

| opponents = File:Forces Libanaises Flag.svg Lebanese Front
File:Forces Libanaises Flag.svg Lebanese Forces
{{flagicon|Lebanon}} Lebanese Armed Forces
{{flagicon image|Flag of the United Arab Republic (1958–1971), Flag of Syria (1980–2024).svg}} Syrian Arab Armed Forces

}}

The Lebanese Movement in Support of Fatah – LMSF (Arabic: الحركة اللبنانية لدعم فتح | Al-Harakat al-Lubnaniyyat li daem Fath) was established in 1968 by Dr. Usama Fakhuri, a second-rank Sunni politician opposed to leading Beirut Sunni za'im Saeb Salam. As its name implies, the LMSF received Fatah backing from the outset and joined the ranks of the Lebanese National Movement (LNM) in 1975.